This repository is the official AWS SDK for Kotlin, a multi-platform SDK providing generated service clients for all AWS services, runtime libraries for credential resolution, HTTP signing, retries, and telemetry, as well as a high-level DynamoDB mapper with compile-time schema generation. The architecture is a multi-module Gradle project with code generation from Smithy models (via smithy-kotlin), runtime modules (aws-config, aws-http, aws-core, aws-endpoint, telemetry-cloudwatch), and a high-level library layer (hll/ddb-mapper). Key entry points for users are the generated service clients (e.g., S3Client.create), credential providers (DefaultChainCredentialsProvider), and the DynamoDbMapper. The SDK supports JVM, Android, and Kotlin Multiplatform. The codebase demonstrates strong engineering practices: extensive unit and integration tests, binary compatibility validation, a type-safe expression DSL for DynamoDB, a composable credential provider chain with caching, and a clean interceptor pipeline for the DynamoDB mapper. It is actively maintained with frequent releases and a well-defined versioning policy.